You may also cough up blood. Other symptoms include:. Even a negative test is helpful because it can rule out TB and help your doctor find other causes for your symptoms.
A positive skin test will usually be followed by a chest X-ray. This can help determine the difference between active TB disease and latent TB infection. Your doctor will look for white spots that indicate areas where your immune system is responding to bacteria. There may be other changes in your lungs caused by TB disease. Your doctor may decide to use a CT scan instead of or as a follow-up to a chest X-ray because a CT scan provides images of much greater detail. If the images indicate TB is present, your doctor may also order tests on your sputum.
Sputum is the mucus produced when you cough. A lab test can identify the type of TB bacteria causing the infection. This helps doctors decide which medication to prescribe.
Tuberculosis TB , a highly infectious disease, primarily affects the lungs. Learn more about risk factors, symptoms, prevention, and treatment. Tuberculosis TB is a serious infection. Pulmonary tuberculosis TB is a contagious, infectious disease that attacks your lungs. People with the germ have a 10 percent lifetime risk of…. Meningeal tuberculosis occurs when tuberculosis travels through the bloodstream to the membranes surrounding the brain and spinal cord, called the….
Learn how we develop our content. To learn more about Healthwise, visit Healthwise. Healthwise, Healthwise for every health decision, and the Healthwise logo are trademarks of Healthwise, Incorporated. Updated visitor guidelines. You are here Home » Tuberculin Skin Test. Top of the page. Test Overview A tuberculin skin test also called a Mantoux tuberculin test is done to see if you have ever been exposed to tuberculosis TB.
Health care workers who are likely to be exposed to TB. People with TB symptoms, such as an ongoing cough, night sweats, and unexplained weight loss. People who have had an abnormal chest X-ray. People who have had a recent organ transplant or have an impaired immune system , such as those with human immunodeficiency virus HIV.
A tuberculin skin test should not be done for people: With a known TB infection. Who have had a previous severe reaction to the TB antigens. Who have a skin rash that would make it hard to read the skin test. How To Prepare In general, there's nothing you have to do before this test, unless your doctor tells you to. How It Is Done For a tuberculin skin test, you sit down and turn the inner side of your forearm up.
How It Feels You may feel a quick sting or pinch from the needle. Risks There is a very slight risk of having a severe reaction to the tuberculin skin test, especially if you've had tuberculosis TB. If a person is found to be infected with TB bacteria, other tests are needed to see if the person has TB disease.
TB disease can be diagnosed by medical history, physical examination, chest x-ray, and other laboratory tests. TB disease is treated by taking several drugs as recommended by a health care provider.
Skip directly to site content Skip directly to page options Skip directly to A-Z link. Tuberculosis TB. Section Navigation. Facebook Twitter LinkedIn Syndicate. Testing for Tuberculosis TB. Minus Related Pages. How does the TST work? What does a positive TST result mean? Additional tests are needed to determine if the person has latent TB infection or TB disease. The tuberculosis TB skin test can tell if you have TB bacteria in your body.
Tuberculosis TB is a bacterial infection that can damage the lungs or other parts of the body. Many people are exposed to TB and test positive for TB bacteria in their bodies, but they don't get the disease. TB bacteria can stay in your body without making you sick.
This is because your immune system can keep TB in check. A doctor may want you to have this test if you have been in close contact with someone who has tuberculosis TB. You may also have the test if you have symptoms that might be causing TB. These include a cough that doesn't go away and unexplained weight loss. In general, there's nothing you have to do before this test, unless your healthcare provider asks you to.
For a tuberculin skin test, you sit down and turn the inner side of your forearm up. The skin where the test is done is cleaned and allowed to dry. A small shot of the tuberculosis antigen purified protein derivative, or PPD is put under the top layer of skin.
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